Typewriting machine



5 Sheets-Sheet 2 m A w NQ Irv m @uw mil Nk Jan. l 1924 J. H. BARR ET AL.

TYPEWRITING MACHINE Filed Sept. l0 1921 1 @www J. H. BARR ET AL TYPEWRITING MACHINE Filed Sebi. l0

1921 5 Sheets-Sheet 5 l J. H. BARR ET AL TYPEWRITING MACHINE Filed Sept. lO. 1921 5 Sheets-Sheet 4,

Jan, 19'

Jan. 1, 1924 Y 1,479,355 J, H. BARR-ET'AL TYPEWRITING MACHINE Filed Sent. 10 1921 5 SheelS-Shei'l 5 vwefntou gn, du @Hoff/ma? M WITNEEEEE c5 Patented Jan. l, 1924.

' UNITED STATES JOHN E. BARR, OF NEW YORK, AND EDWIN E. BARNEY, OF NEW ROCHELLE, NEW YORK, ASSIGNOBS TO REMINGTON TYPEWRITER COMPANY, 0F ILION, NEW YORK,

.A CORPORATION OF NEW YORK.

TYPEWRITIN'G- MACHINE.

Application filed September 10, 1921. Serial 499,682.

To all whom t may ca /noem:

Be it known that we, JOHN H. BARR and EDWIN E. BARNEY, citizens of the United States, and residents, respectively, of the borough of Manhattan, city, county, and State of New York, and of New Rochelle, in the county of Westchester and State of New. York, have invented certain new and useful Improvements in Typewriting Machines, of which the following is a specification.

Our present invention relates to tabulating mechanism for typewriting machines, and more particularly to the style of such mechanism known as column selecting mechanism.

The main -object of the invention is to provide new and improved column selecting mechanism adapted to arrest the carriage in selected columns, intervening columns being skipped or passed, the mechanism in the present instance being operative in both directions of the carriage travel.

Other and specific objects of the invention are to provide, first, new and improved co-operating stops with which the key controlled column stops co-operate; second, a detachable unitary structure comprising a frame or mounting and a major part of the the column selecting mechanism supported thereon; third, means for s upporting and controlling the stop bar or sup ort of the column stops whereby said stop bar may be moved in one direction transversely of the path of movement of the co-operating stop 1o select the column, and subsequently moved in another direction or projected towards the co-operating stop to arresting position; fourth, locking mechanism for the carriage release, which mechanism also includes locking or preventive means whereby the stop bar is prevented from moving to arresting position and also releasing the carriage before the preliminary or column selecting movement of said stop bar has been completed; fifth, a mounting of the column stop supporting bar which enables it to be thrown up by hand to a position where' the column stops may be adjusted with facility; sixth, improved guiding means for cont-rolling movements of the column stop bar and column stops; and seventh, an improved detachable key cap or button.

To the above and other ends which will hereinafter appear, our present invention conslsts in thefeatures of construction, combinations of devices and arrangements of parts hereinafter described and particularly pointed out in the claims.

In carrying out our invention in the present instance, we provide a toothed stop support or bar on which the column stops are 'adjustably arranged in progresswe or stepped order, said stops being adapted to co-operate with one or another of two carriage-carried stops to arrest the carriage according as thecarriage is to be arrested during its rightward or leftward movement, these co-operating stops being spring mounted and spaced'apart to vpermitthe stop portions of thecolumn stops to fit between them,

the non-arresting carriage stop serving to prevent rebound. The column stop bar is carried by crank arms extending vfrom a rock shaft which in'turn is pivotally mounted on other crank arms extending from a second rock shaft; and key operated-means are providedv for differentially swinging the columnstop bar and column stops on the first rock shaft as a pivotal center to select a column, and for thereafter swinging the first rock shaft on the second rock shaft as a-pivotal center through a uniform or unvarying distance to carry the column stops to arresting positions, the carriage being concurrently released. The means by which the column stop bar and column stops are v the form of a bail, the other rocking frame being actuated uniformly by lugs or projections -on the cam members, said-lugs coming into play duringA the second part of the key strokes. The rocking frames, cam members, oppositely moving levers and links aforesaid are mounted on a tabulator frame, which l is provided with a pair of hooks and is detachably secured by two screws to stationary parts of the machine. It is only necessary to unscrew these screws and remove the key caps of the tabulator keys to enable the supporting frame and the parts mounted on it to be removed.

Our improvements will be described specilically in connection with the accompanying drawings which illustrate the preferred form of the invention. In said drawings,

Figure 1 is a fragmentary front to rear vertical sectional view taken about centrally 0f a typewriting machine embodying our invention.

Figure 2v is a fragmentary sectional view taken on the same plane as Figure 1 and showing devices omitted at the top in Figure 1 for lack of space.

Figure 3 is a fragmentary side elevation, partly in section, showing the column stop bar thrown up to abnormal or stop-adjust.- ing position.

Figure 4 is a fragmentary rear elevation, partly in section, showing particularly the upper part of the machine.

Figures 5 and 6 are views showing the c'ooperating or carriage stops in dilferent relationships with one of the column selecting stops, said views being rear elevations partly in section.

Figure 7 is a fragmentary view on an enlarged scale of a detail.

Figure 8 is a fragmentary horizontal sectional view taken on a plane indicated by the dotted line 1-1 in Figure 1 and looking downward in the direction of the arrow at said line.

Figure 9 is a perspective view of the cam members or levers and their pivotal support.

Figure 10 is a fragmentary end view on an enlarged scale of the cam members.

Figure 11 is a fragmentary horizontal sectional view taken on a plane indicated by the dotted line 2 2 in Figure 1 and looking downward in the direction of the arrows at said line.

Figure 12 is a fragmentary plan view showing the set of column selecting keys.

Figure 13 isa fragmentary sectional view corresponding to Figure 1 but omitting some parts shown in said figure and showing other parts as they appear when one ofthe column keys has been partly depressed Figure 14 is a fragmentary vertical seotional view showing the parts as they appear when the column key, shown partly depressed in Figure 13, has been fully depressed.

Figure 15 is a detail view showing the carriage release lock just after it has been moved to unlocking position.

Figure 16 is a detail plan view showing the mounting of the column stop bar.

Referring first te Figs. l, 2, 4, 8 and 11, the main frame of the typewriting machine illustrated therein comprises side plates or frames l which are connected at the front by' .The upper rollers co-operate with n. groored ball seat formed in a stationary guide bar 7 which extends crosswise of the machine and is secured by screws 8 to the upper end portion of an angle or bed plate or support 9 which is mounted at the top and rear ot' the frame plates 1 and is suitably secured thereto. The guide bar 7 is fixed to the top of the vertically disposed portion of the bed plate 9, said plate having a forwardly extending horizontal portion which terminates in an upward extension 9a formed with a grooved runway or seat for the lower rollers 6. Journaled on the traveling carriage 3, 4 is a roller platen 10 with whose front face co-operate type bars 11 which are normally horizontally disposed and rest against a pad 12, the type bars being pivoted on a common pivot wire 13 mounted on a type bar support or segment 14. Each type bar is provided with an inclined slot 15 which is engaged by a pin 16 projecting from a bell crank 17 pivoted at 18 and connected by a link 19 with an angular lever 20 pivoted at 21 in a sub-frame 22. As best appears from Fig. 11, the sub-frame is open and rectangular and is provided at its corners with lugs 23 which receive securing screws 24 by which the sub-frame is detachably secured to lugs 25 projecting inward from the side frames 1. Each -lever 2O carries a pin 2G which engages in a slot 27 formed in the rear end of a key lever 28, the set of key levers extending forward and being pivoted on fulcrum wires 29 mounted in the subframe 22. Each key lever is provided with a cap 30 and it will be understood that when one of the printing keys or caps 30 is de-v pressed it will operate through the described train of devices to swing the type bar into printing contact with the platen and the paper thereon. During printing movements the type bars will actuate carriage feeding or escapement devices not fully shown herein but which preferably are of the construction disclosed and claimed in the pending application of Arthur W. Smith, Sr. No. 476,788, filed June 11, 1921. Said escapement devices are connected with and control the carriage through connecting mechanism which, although shown herein, is the invention of John H. Barr and is dis- Llll closed and claimed in his application Sr. No. 423,629 filed November 12, 1920. Suitably supported on the carriage 3, 4 is a feed rack 31 which constantly meshes with a feed i connecting said pinion with the toothed escapement wheel 36 which is fixed to the shaft 33. Said connecting devices comprise a pawl 37 pivoted to the front face of the escapement wheel and provided with a tooth which is maintained normally engaged with the teeth of the pini'on 32 by a spring 38. The escapement wheel is normally dogged or prevented from turning by devices comprising a dog shown conventionally in Fig. 4 and designated as 39, whereby the carriage is prevented from moving from right to left under the constant-impulse of its motor or spring drum mechanism, which spring drum mechanism comprises a band wheel 40 having a pivot 41 and connected by a band or --strap 42 to the carriage through a pin or device 43 projecting rearwardl from the right-hand end portion of the bar 3. The carriage may be released from the control of its escapement mechanism by devices operative to disconnect the pawl 37 from the feed pinion 32, said devices `comprising a sleeve 44 slidably mounted on vthe escapement wheel shaft and provided with flanges 45 and 46, the front flange being beveled as indicated at 47 to cc-operate with a pointed' pin 48 fixed to the pawl 37 and projecting rearward therefrom through a slot in the escapenient wheel 36. The sleeve 44 is controlled by a lever member pivoted on a screw pivot 49 rising. from the bed plate,

said member being preferably formed of a.

piece of sheet metal and comprising an arm 50, a vertical cross portion 51 and a .second arm 52 terminating in a head 53 fitting loosely between the flanges of the sleeve 44 as in the prior construction. In addition, the lever member is provided with an arm 54 which extends leftward and slightly upward from the pivot 49 and at its endhas a rearward extension terminating in an upright contact portion 55, this arm 54 being included in a tra-in of releasing devices automatically operative by the novel tabulating mechanism as will hereinafter appear. The lever member may be operated by a bar 56 hung from the back of the carriage bar 3 and adapted to be actuated Aby a release key (not shown) on the carriage. Actuation of the release key swings the bar 56 rearward,

as hereinafter appears. ing 65 the inner endsof the blades tercausing it in turn to press against the lever arm 50, swinging the lever member on its pivot 49 and causing the head 53 to slide the sleeve 44 forward, thel beveled face 47 thereof co-acting with the pointed pin 48 to cam the pawl 37 outward until it disengages from the pinion 32. The lever member has a return spring The tabulating mechanism comprises carriage carried stop devices which are supported on a bracket which may be of sheet metal comprising a horizontally disposed portion 57 extending over the'top of the carriage part 3 and provided at its front with a downwardly bent portion or ear 58 and at its rear with a downwardly bent portion or extension 59, the latter .terminating in rearwardly extending lugs 60 (Figs. l, 2 and 4 to 6 inclusive). The downwardly extending portion 58 overlies and is secured to the upper vertical part of the carriage part 3 at about its middle as by screws 6l. The rear downward extension 59 provides a support for a pair of stop members or blades 62 and 63 which are arranged end to end in the same vertical plane between the lugs 60 of said blades, the outer ends of said blades beino pivoted on headed shoulder screws 64 which are threadedinto the rear face of the bracket portion 59. The inner ends or arresting edges of the blades are spaced apart providing an opening indicated at 65 which is ladapted to receive the column stops duringvtabulating operations, the latter contacting with said inner edges -Above this openwhich they are adapted to swingv about their pivotal centers 64, which plane, it will be observed, is parallel with the path ot' movement of the carriage, said pivotal centers or axes 64 being parallel with each other and extending at right angles to said path of movement. The stop blades 62 and 63 are independently mountedand individ-- ually spring pressed, the pressure being .exerted by devices comprising spring plungers 68, each composed of a head and a shank, said plungers being slidably seated in openingsor depressions 69 formed in'the blades above their pivots 64. Confined between each plunger head and the bottom of the A so the head ofthe associated depression 69 is a plungerY spring 70, said sprin being coiled around'the shank of the pllimger, and constantly' tending to press the plunger outward an maintain the top or edge of its head which is rounded, as shown.I in contact with the inner face of the adjacent lug 60. The reaction of the spring plunger tends to maintain the associate stop blade down with its lug or stop 66 in contact with the stop 67 as shown in Figs. 4 and 6. `When one of the blades is raised or swung up, as shown in Fig. 5, the associate plunger is forced further into the depression 70 and when the stop blade is released said plunger pushing against the lug 60, forces the stop blade down into normal position in contact with the limiting stop 67. rThe stop blades, as hereinafter appears` are swung or cammed upward by the column stops, the under edges 62a and 63a of said blades being oppositely inclined downward towards their inner or free ends and serving as cams.

The carriage-carried stops above described cooperate with a plurality of column stops, a set of five of said column stops being vshown in the present instance. The column stops best shown in Figs. 1, 3 and 4 and each designated as a whole by the reference numeral 71, are preferably of the construction shown in the patent to Woodward, No. 1,371,- 591 dated March 15, 1921, and comprisel a middle portion 72 fixed between two side plates 73, each middle portion being provided with a lug or a column selecting stop proper 74, and an oppositely disposed stop ledge 75. The column stops are adjustably mounted on a stop rack or bar 76 which is oppositely toothed at its top and bottom sides, the side plates of each stop being notched to fit between the teeth and the middle portion being cut out to fit over the stop bar outside of its teeth. Normally the stops 7l are arranged on the stop bar so that the column selecting lugs 74 project upward towards the cooperating stops 62 and 63, said column stops being so disposed or adjusted that when viewed from the left-hand side of the machine the stop lugs will appear disposed progressively or in stepped order as in Figs. 1 and 3, with the stop lug 74 of the first or righthand column stop at the rear of the set of stop lugs, while the stop lug 74 of the fifth or left-hand column stop 71 will be at the front of the set of stop lugs, the stop lugs 74 of the intervening or second, third and fourth column stops being intermediately disposed. In the present instance it will be observed that the column stops are arranged in regular order considered lengthwise of the machine, that is, the l column stop is at the right hand and the 2 column stop is next to it at the leftand then come, one

' after the other, the 3, 4 and 5 column stops. However, it is to be understood that this lengthwise disposition of the column stops'may be varied in accordance with the word in hand, so that instead of the 2 stop being immediately to the left of the 1" stop., the 3 stop or one of the others may replace it and in turn may have any one of the remaining column stops at its left along the stop bar; and so on. However, whatever the arrangement of the column stops considered lengthwise of the stop bar, it will be understood that when considered crosswise of the bar or fore-and-aft of the machine they will be progressively arranged so that the stop lugs 74 will always be disposed in the same set of transverse vertical planes, the plane of the stop lug of the l stop being always at the rear and being always succeeded progressively and regularly towrds the front by the planes of the stop lugs of \,the 2,3, 4 and 5 column stops respectively. The stop bar 76 is provided at its ends with angular lugs 77 (Fig. 16) which are received in corresponding depressions indicated at 78 formed in the inwardly extending portions 79 of a pair of angular members, the main arms 80 of which extend upward at right angles to the portions 79. Headed screws 81 pass through the portions 79 and are threaded into the ends of the stop bar 76, the heads of said screws being countersunk, the stop bar and the parts 79, 80 being thus' secured together, and the lugs 7 7 preventing the' stop bar from turning relatively to the angular members, the arms 80 constituting in effect rigid angular ex'- tensions or bail arms of the stop bar. At their upper ends the arms: or extensions 80 are pivotally connected by headed shoulder screws 82 to vertically disposed crankv arms 83 the shoulder portions of the pivot screws 82 rotatably engaging in holes in the enlarged end portions of the crank arms, the

screws being threaded into the end portions of the extensions 80 as will be understood best from Fig. 4. Viewed sidewise the crank arms 83 are seen to be slightly angled and at the bends are-provided with cylindrical bosses or enlargements 831 The extensions 80 are arranged inside the crank arms and are adapted to contact with said crank arms at their enlarged tops and through the bosses 83a, the contact faces being finished, so that the crank arms with their support hereinafter described may co-operate to prevent endwise displacement of the stop bar 76 under stresses caused by the tabulating operations. The stop b ar is in line with the bosses 83a. The upper end portion of each crank arm 83 is provided with angularly disposed faces 84 and 85 which are adapted for co-operation with the free end portion of a spring device or finger 86 which is arranged behind the associate crank arm and is provided with an inwardly extending lower end portion 87 and an outwardly prollt) jecting end portion'88 which is rounded-off as shown in Fig. 4. The portion 87 receives a pair of headed screws 89 by which the spring 86 is fixedly secured to the part 79 of the stop bar, the construction being such that normally the spring members or fingers 86 co-operate with the faces 84 to maintain the arms 80 aligned or in parallelism with the crank arms 83, said spring lingers near their lower ends contactingwith the curved faces of the bosses 83 on the crank arms 83 to limit pivotal movement of the crank arms 80 and stop bar 76 in one direction under the impulse of the springs 86 in co-operation with the faces 84. Thefoutwardly projecting portions 88 of the spring members 86 serve as linger pieces by which the stop support comprising the bar 76 and arms 80 may be swung upward and rearward on their pivotal centers 82 from the Fig. 1 to the Fig. 3 position, thus bringing `the stop bar in a position where the column stops 71 may be` conveniently adjusted therealong or removed therefrom, it being only necessary to push the stops down between the stop bar teeth or to pull the stops up, the stop bar being fully exposed throughout its length at this time. The stop bar'is maintained in the abnormal or Fig. 3 position by co-operation of the spring lingers 86 with the faces 85 at the tops of the crank arms 83. After adjustment of the column stops the stop bar is thrown or swung down to normal relationship with the vertically disposed crank arms as shown in Fig. l; and it is to be understood that during the tabulating mechanism hereinafter described the relationship between the crank arms 83 and the stop bar is a constant one and is maintained as though the stop bar were fixed to the crank arms. The only time this relationship is disturbed is when the stop bar is thrown up by hand to the Fig. 3 position and this is solely for the purpose of facilitating adjustments of the column stops on the stop bar proper. Viewed from the rear as in Fig. 4 the lower end portions of the crank arms 83 are curved or off-set inward towards each other and terminate in hub portions 83d formed with holes which receive the end portions of a horizontally disposed rod or rock shaft 90, the crank arms being fixed to the rock shaft by pins 91 passing through the hubs 83b and through the end portions of said rock shaft. Said rock shaft 90 is provided with a support which enables the rock shaft to be given a movement of rotation and also to be moved bodily together with the stop bar 76 and the stops thereon. Said support, as clearly appears from Figs. l. 4 and 8, comprises asecond pair of crank arms 92 which are horizontally disposed terminating at their forward end portions in hubs 93 and at their rear end portions in heads, each of which is slotted or bifureated as indicated at 94 to provide a pair of parallel jaws 95 vsmooth shank of lesser diameter connects each pair of jaws 95, the shank of said screw bridging the gap or slot 94 between said jaws just above and contiguous to the top of the rock shaft 90. The construction is such that the rock shaft can be readily removed from its bearings by detaching the screws 96, while when said screws are in place above the rock shaft the latter may turn freely on its bearings but is prevented from upward displacement by the screws. The crank arms 92 are arranged just inside the hubs 83", and the rear ends of said crank arms co-operate with the inner ends of said hubs to preventl endwise displacement of the rock shaft 90 in its bearings. The hubs 93 are olf-set inward towards each other from their crank arms 92 and are provided with holes for the reception of the end portions of a second rock shaft 97 to which the crank arms 92 are secured by cross pins 98 passing through the hubs 93. Said rock shaft 92 at its ends is formed with conical depressions which receive the conical inner ends of screw bearing pins 99 which are threaded through lugs or projections 100 integral with and projecting upward from the inside ofthe bed plate 9. The outer portions of the screw pivots 99 receive cheek nuts 101 by which they are held in adjusted positions. The bed plate 9 is provided with slots indicated at 102 and 103 through which the crank arms 92 project rearward, said slots permitting rotary movements of said crank arms about their pivotal axis 97.

The means for actuating the column stop bar 76 and the column stops thereon are .key operated and comprise separate trains of devices connecting respectively ,the rock shafts 90 and 97 with the column selecting keys, enabling the rock shaft 90 to be rocked differentially and the rock shaft 97 to be rocked uniformly during concurrent operations. The train of connections for the rock shaft 90 comprises a depending crank arm 104 provided with a hub 105 which lits over the rock shaft 90 near its right-hand end, and is fixed thereto by across pin 106 as shown in Figs. 1, 4 and 8. Near its lower or free end the crank arm 104 carries a cross pin comprising, when viewed from the rear as in Figs. 4 and 8, an engaging portion 107 projecting leftward and terminating in a head or flange 108 while the rightward projection of said pin provides a guide portion 109. The flanged engaging device 107 and the guiding device 109 projecting oppositely from the crank arm 104 may be separate 4ius pieces if desired. It will be noted that the parts of the operating train for the rock shaft 90 as thus far described, comprising the crank arm 104 and the device 107, are mounted on and are detachable with said rock shaft 90.' The operating train of devices for the rock shaft 97 comprises a crank arm 110 having a hub 111 which fits over the rock shaft and is secured thereto by a cross pin 112. The crank arm 110 is arranged in a fore-and-aft plane somew-hat to the left of the plane of the crank arm 104 and eX- tends 'downward from the rock shaft 97, its lower end portion being curved in somewhat of a horn shape providing at its front lower side an engaging face or edge 110a which is straight at the beginning and thence curves gradually towards the rear.` .It will be noted that the arm or element 110 of the train of actuating devices for the rock shaft 97 is fixed to and carried by said shaft. Both the arms 104 and 110 project downward through a slot or cutout 113 in the bed plate 9, said cutout ador-ding play for said arms during their operation. The remaining elements of the two trains of actuating -devices for the rock shafts 90 and 97 are supported independently of the two rock shafts and mounted on a tabulator supporting frame hereinafter described so that they may be detached from the machine with said frame as a unitary structure. For the rock shaft 90 the remaining elements of the actuating train comprise a vertically disposed lever 114 of the first order, the top portion of the upper arm of said lever being odset or curved rearward as indicated at 115, the off-set at its end being provided with a slot indicated at 116, said slot extending upward andk rearward and being open at its upper end. Loosely engaging in said slot is the flanged device 107, a pin-and-slot connection thus being provided between the crank arm 104 and the lever 114. Said lever, as best shown in Figs. 1, 4 and 11, is pivoted or fulcrumed on the shoulder portion of a headed screw 117 which is supported on a stationary part with which it is held in fixed relationship by a pair of spacing sleeves or washers 118 and a clamping nut 119 coniprising a body portion and a head or flange. Leaving for later description the construction of the devices for actuating the lever 114 the means by which the fulcruin of said lever is supported will next be described.

The stationary part which is disposed between the spacing sleeves 118 is in the present instance in the form of a rearward eX- tension 120 of the right-hand vertical side plate 121 of the detachable tabulator frame hereinbefore referred to and which is clearly shown in Figs. 1, 11 and 13. Said frame further comprises a left-hand vertical side plate 122 spaced apart from the plate 121 and rigidly connected therewilrby a rear cross rod 123 and a front cross rod 124,`said cross rods having reduced threaded portions numbered respectively 125 and 126 which project outward beyond the outer faces of the plates 121 and 122 and receiving clamping nuts 127, the side plates being clamped between said nuts and the inner ends of the body portions of said rods which abut against the inner faces of the side plates 121 and 122. The construction provides a rigid framework or tabulator frame comprising the two side plates 121 and 122 and the cross rods 123 and 124. Near their rear end portions the side plates 121 and 122 are provided with inwardly bent horizontal ears 128, while near their front ends and on the same level with the ears 128 said side plates are provided with rearwardly directed hook portions 129. The hooks 129 are adapted to engage in slots indicated at 130 (Fig. 13) formed in the sub-frame 22 at its front lunder side, the hook portions of the tabulator frame being received in a trough-like portion or undercut 22 of said sub-frame, the slots 130 being formed in the rear wall of said undercut. The ears 128 of the tabulator frame are perforated to receive headed screws 131 which are threaded upward into a horizontal ledge 22b on the rear of said sub-frame 22, the pair of screws 131 secur` ing the tabulator frame to the sub-frame and (1o-operating with the hooks 129 to maintain a fixed relationship between the tabulator frame and the stationary framework of the machine in which latter the sub-frame 22 is comprised.

Returning now to the lever 114 and the devices for actuating it, the lower arm of said lever is provided with an elongated slot indicated at 132 which co-operates with a pivotal connection between the lever 114 and the rear enel of a link 133 which extends forward outside the plate 121. Said pivotal connection is shown in detail in Fig. 4 and comprises a hea-ded shoulder screw 134, a pair of washers 135 and a locking or check nut 13G. The washers are arranged on the shank of the screw 135 at opposite sides of the lever 114 through the slot 132 whereof said-shank passes. The link 133 is formed with a hole which tits over and rotatably engages the shoulder portion of the screw 134, said lever being loosely confined between the head of the screw and one of the washers 135, the shoulder portion of the screw holding the washer away from the screw head and preventing binding of the link 133. The nut is arranged at the opposite side of the lever 114 .and binds against the washer at that side. By loosening the nut 136 the whole pivotal connection or contrivance may be shifted lengthwise of the slot 132 and reset, thereby providing in effect for a lengthenlng or shortening of the lower arm of the lever 114 by varying the distance from the fulcrum of said lever 114 at which the connecting link 133 acts. The forward end of said link 133 is pivotally connected by a shouldered rivet 137 with the free end of a crank arm 138, (Fig. 11) said crank arm being inclined downward and rearward from its point of connection with the link and being provided at its lower end with a hub 139 which lits over the projecting outer end of a rock shaft 140, being secured thereto by a cross pin The rock shaft extends transversely of the tabnlator-frame and bears in the side plates'121 and 122. The crank arm 138 is arranged outside the plate 121. Fixed to the opposite end portions of the rock shaft 140 inside the plates 121 and 122 are a pair of crank arms 142 and 143 provided with hub portions 144 and 145 which fit over the rock shaft and are pinned thereto, said hubs abutting the inner faces of the plates 121 and 122 and preventing endwise displacement of the rock shaft 140. The pair of crank arms 142 and 143 are disposed inparallelism with each other and with the crank arm 138, said pairvbeing connected at their free ends by a cross rod 146 which is flattened on its under side as indicated at 147. The cross rod 146 and the pair of crank arms 142 and 143 constitute a bail and 'said bail together with the rock shaft 140 and the crank arm 138 constitute a rocking frame. The rocking frame is constantly impelled forward b a coiled spring 148 arranged between t e link 133 and the plate 121, said spring being anchored to a pin 149 projecting from said link and having its opposite end hooked over a pin 150 projecting inward from the link 133. The pull of the spring is transmitted through the link to the lever 114 and thence to the rock shaft 90 and stop bar 76. y

Said rocking frame is adapted to be differentially actuated by mechanism compris-v ing, a set of five levers 151, there being a lever for each column selecting stop 71. These levers are of a similar construction. each being provided with a hub portion 152 which bears on the cross rod 124. the levers being pivoted co-axially on said rod and being maintained properly spaced apart therealong by sleeves or washers 153, the washers being uniform in length and supplemented by a shorter sleeve 154 interposed between the right-hand lever 151 and the side plate 121. The members 151 are levers ofthe first order, their rear arms being somewhat broadened or widened to provide stock for slots which are cut or otherwise formed in said arms. The slots differ in forn'iation as will be clearly apparent from Fig. 10. The slot in the left-hand lever 151. which slot is indicated by the numeral 155. is for economv of motion preferably cut concentric with the` axis 124 of the lever although it may be inclined very slightly towards the rear from its top providing a comparatively slight cam. The slot 156 in the second lever is inclined somewhat more toward lthe rear providing a greater cam while the succeeding slots 157, 158 and 159 formed respectively in the third, -fourth and fifth levers incline one after the other more sharp-ly to the rear to provide for still greater or wider cams. In other words, all of the slots in the set of levers 151 or all of them with the exception of the slot are cut to provide progressively disposed cams which cause corresponding progressive or differential movements of the cross rod 14'6 which they are adapted to actuate. Each of the cams terminates at its lower. closed end in a dwell portion. The mouths of the cam slots are open, and the forward or right-hand sides or edges of the mouths, as indicated at 160, are in line with each other, viewed from the side, providing stop faces for the rod 146 of the rocking frame, said rod being normally maintained in contact with said stop faces and opposite the cam opening proper by the spring 148. The top edges 161 ofthe cam levers behind the slots are also in line with each other and are slightly curved in conformity to an arc having its pivotal center in the rock shaft 140. Also the flattened under face 147 of the rod 146 is preferably curved to con form to the curved arc. This enables the rod 146 to swing freely over and close to the edges 161 of theunactuated cam members when the rocking-frame is operated by one of the cam members, and also enables it to serve as a stopl to prevent premature operation of a second cam member. The rear face or edge of each cam lever terminates at its lower end in a rearward projection or lug 162 which is adr pted to actuate the train of devices operative on the crank arm 110 as hereinafter explained. Each cam lever is provided with a coiled restoring spring 163 which is hooked j at its upper end over a pin-164 projecting laterally from the rear arm of the cam lever. the lower end of said spring being hooked through a hole in a transverse anchor bar 165 which at its ends is provided with pintles 166 bearing rotatably vin holes in the guide plates 121 and 122. The springs 163 tend constantly to swing the rear arms of the cani levers 151 downward where they may be normally arrested by the rod 140 and to swing upward the forward arms of said cam levers. Said forward arms are comparatively narrow and are provided with holes indicated at 167 which receive pivots 168 by which the cam levers are pivotally connected with upright key stems 169. Said key stems are preferably formed of sheet metal and arc U-shaped in cross section ex cept at their lower and upper ends.. the lower ends having the' bend of the metal cnt out so as to provide two parallel plies 17() which loosely embrace the forward end of the 'f vcn sociate cam lever yand receive the pivotal cross pin or rivet 168, the key stem thus being permanently connected to the cam lever or key actuated member 151. At the upper end or top portion the sides of each key stem are elongated and curved towards each other at the rear, as best shown in Figs. 1 and 12, to provide a continuous top portion 171 substantially enclosing an opening indicated at 172. Each key stem is provided with a key cap or button, the device comprising a key proper 178 Vand a flat projection or prong 174 preferably of spring metal and fixedly connected to the key 178. The prong or projection 174 comprises a narrow or neck portion 175 terminating in an enlargement or head 176. A narrow slot or kerf, indicated at 177, extends longitudinally through the middle of the prong and bifurcates the neck and head. The crosswise dimension of the head is slightly greater than the length of the opening 172 in the key stem so that the bifurcated portions ot the head mustl be forced together narrowing the slot 177 when the prong is pressed downward through said opening. The prong is otsuch length that the head may be forced downward entirely through the closed upper end of the key stem and when the compressed head passes the lower end of the opening it will expand or return to normal position through the inherent spring in the metal. thus securely interlocking the key cap with the key stein. This novel detachable or frictional connection between the key stems and their caps is an advantage in the present instance for the reason that the key stems pass through guide slots or openings indicated at 178 formed in the top ot the comb platel 179 by which the l key levers 28 are guided near their front ends, said comb plate being secured to the frame of the machine by screws, as 180. Since the keys 173 are too large to pass through the guide slots 178 in the comb plate it is necessary, if the unitary structure comprising the tabulator trame and parts mounted on it is to be detached without disturbing thecomb plate, that the key stems 169 which are part of said structure be withdrawn downward through the guide slot 178. n order to accomplish this itis only necessary to pull up on the keys 173 with sufficient force to overcome their frictional or interlocking engagement willi the key stems, the construction being such that the keys may readily be detached by a slight pull.

The train of devices between the column selecting keys 173 and the crank arm 110 for rocking the shaft 97 and projecting the column stops selectively to arresting position during the. later stages of the key strokes is also supported on the detachable tabulator frame and will next be described, reference being had to Figs. 1, 4, 7, 12 and 13. Said train comprises a lever 181 of the first order, said lever being vertically disposedand fulcrumed on the cylindrical body portion of the clamping nut 119 inside the extension 120. Viewed from the rear, as in F ig. 4, the upper arm of said lever is slightly ott-set rightward to bring its upper end to the right of the crank arm 110. The upper end of said lever 181 carries an adjustable contact device comprising a threaded shank 182 and an eccentric head 183, said device being clamped to the lever by a nut 184. By loosening the nut the device may be rotated to vary the distance of the contact or head 183 from the face 110a of the crank arm 110 with which face said head is adapted to cooperate. The lower end portion of the lever 181 terminates in a rearward offset 181a which is formed with an elongated upright slot 185 in which is adjustably supported a pivotalV connection or contrivance similar to the one at the lower end of the lever 114 and comprising a headed shoulder screw 186, a pair of washers 187 and a locking nut 188, the locking nuty and the screw shoulder co-operating through the interposed washers to clamp the contrivance in fixed relationship with the lever 181 and at desired distances from the pivotal axis of said lever. The shoulder portion of the. pivot screw 186 is rotatably engaged by the rear end of a link 189, which at its front end is pivotally connected by a shouldered rivet 190 with a rocking trame which for convenience may be made in two parts, namely, two bail-like devices, one of which is an upright. bail comprising a cross bar portion 191 and two upright portions or arms 192 provided at their upper ends with outwardly projecting pivots 193 which beai' in holes in the plates 121 and 122. The other bail comprised in the rocking frame. is preferably made of sheet metal and consists of an upright cross portion or bar 194 terminating at the top in a forwardly extending lip or ledge 195 and two side portions or arms 196 extending rearward from the ends of the portion 194, said arms 196 being rigidly secured as by rivets to the arms 192. There is thus provided a rectangular frame which is adapted to be rocked or swung up and down on the pivots 198 to a limited extent as determined by stop devices comprising a pin 197 projecting laterally from the righthand side ot' the rocking frame and extending into a hole 198 formed in the side plato 121. The rocking frame comprising the. ledge 195 is adapted to be actuated by all of the lugs 162 at the latter part ot the strokes of the keys 178, such actuation swinging said rocking frame up, the motion being transmitted through the link 189 to the lever 181, and thence to the rock shaft 97 through the crank arm 110, which motion is effective to move the column stops to arresting position after the selected column stop has been brought into line with the cooperating stops on the carriage. This mo'- tion of the rock shaft 97 is also effective automatically to release the carriage,such motion being transmitted to the contact of the releasing lever member by a pin or device 199 fixed to and projecting upward from the rock shaft 97. Said pin is arranged just behind said contact portion 55 and operates when the shaft 97 is rocked to push against the contact portion and swing the lever memberv on its pivot 49, causing the head 53 to slide the sleeve 44 forward to cam the pawl 37 out of the feed pinion 32.

In order to promote thel certainty and efficiency of operation lof our improved column selecting mechanism there are provided means for guiding the column stop bar 76 during its movement to arresting position in any one of a number of predetermined paths, and also means for preventing such movement, as well as preventing the release of the carriage, prior to the completion of the preliminary or column selecting movement of the stop bar 76. Referring specifically to said means they comprise, as appears from Figs. 1, 4, 8 and 13, an angular bracket having a horizontal portion 200 and a vertical plate-like portion or'ear 201 bent downward at right angles from the horizontal portion. Said horizontal portion is secured by screws 202 to the bottom of the bed plate 9, the screws passing through elongated slots 203 in the bracket, which slots afford adjustment of said bracket on the bed plate. The vertical plate or ear 201 extends downward through the cutout 113 in said bed plate and between the crank arms 104 and 110. The ear 201 is provided with a lateral stop pin 204 with which the arm 110 contacts to limit its forward swing. The lower end of the ear terminates in a pair of stop fingers 205 and between said stop fingers is formed or provided a plurality of guideways or slots indicated at 206, said slots of which there are five, being cut or otherwise formed radially of the rock shaft or pivotal center 90. The slots 206 are of a width to adapt them to the pin or guiding device 109 on the crank arm 104, said pin engaging with said slots during the upward swing of the rock shaft 90. The 'stop fingers 20'5 are adapted to co-operate with said pin to prevent undue swinging movements of the crank arm 104.

Locking devices are provided which serve as means to prevent premature arresting movements of the stop bar 76 and of the releasing pin 199. Said lockingV devices are shown in Figs. 1, 4 and 13-15, and comprise a lever member 207 provided with three arms or branches 208, 209 and 210, said member being disposed at the right of the crank arm 110 and pivoted on a pin 211 projecting laterally from said crank arm. Movement of the lever 207 on its pivot 211'is limited by stop devices comprising alateral pin 212 on the crank arm 110, said pin engaging loosely in a slot indicated at 213 cut in the lever arm 209. As shown in Fig. 1 the lever arm 208 normally extends rearward substantially in horizontal line with the pivot 211 and the rear end of said lever arm 208 abutting against an abutment or fiat face 214 of a stop pin 215 projecting from the guide plate or ear 201. The lever arm 210 extends downward and its front edge is straight and normally stands slightly forward of the edge 110a of the crank arm 110 which adjoins it at the left, both arms receiving actuations from the contact device 183, but the arrangement of the parts being such that the contact device first operates on the arm 110 to swing the lever 207 on its pivot and raise the arm 208 clear of the abutment or stop face 214 before the contact device begins to press against the arm 110. This timing is essential as it will be understood that so long as the arm 208 is opposite the abutment 214 said abutment will prevent the arm 110 from being swung rearward thus locking the rock shaft 97 from operatively turning and preventing the carriage from being released by the tabulator-controlled releasin devices 199 and 55.

n operation it will be understood that the rocking frame comprising the cross rod or cam bar 146 will be swung or cammed rearward to different extents about the axis 140, the extent depending on which one of the column selecting keys 173 is actuated, this differential movement being due to the variation of the cams in the levers 151. The

first or left-hand lever 151 may, however, if preferred, not cause any swinging movement of the rocking frame. The swinging movements of the rocking frame are trans` mitted through the link 133 to the lever 114, the lower rear arm whereof is swung rearward and the upper arm forward, this forward movement being transmitted to the connected crank arm 104 which will be swung forward rocking the shaft 90. The rocking movement of said shaft will in turn be transmitted to the column stop bar 76 which` during operation, is fixedly related to and supported from said shaft, said stop bar being swung rearward from normal position carrying the stepped column stops rearward transversely of the path of movement of the carriage and of the co-operating stops or blades 62 and-63 thereon. ,These transverse movements of the column stop bar and column stops are differential in correspondence with the variation in the cams; thus the first cam lever may operate through its slot 155 to cam the bar 146 not at all or only very slightly so that no transverse moveranged ment, or a very slight one, will be communicated to the column stop bar, with the result that the stop lug 74 for the first column will be brought into line with or into the plane of the co-operating stops or blades 62 and 63 below and out of the path of the same. Similarly the initial actuation of the cam levers 151 in which are formed the cams or actuating slots 156,157, 158 and 159 will result in corresponding variations in the rocking movements of the shaft 90 'and the transverse movement ot the stop bar 76 and column stops, moving respectively the stop lugs 74 for the 2, 3, 4 and 5 column stops into line with-the cooperating or carriage carried stops. It will be observed that the-cam levers 151 are arin reverse order from the column stops they control, the 5 column stop being at the left of the set onthe stopbar, and itscam lever being the right-hand one of the set of levers 151. It will be understood that during the initial stage of the key depression, resulting in the rockingv of the shaft 90 and the selected predetermined movement of the column stop bar and the column stops as described, the rock `shaft 97 and the crank arms 92 by which the rock shaft 90 and the column stop bar 76 are sup-- ported, will not be alected, but will be maintained locked against operative movement, as will the tabulator-controlled carriage release by locking or preventive mechanism comprising the lever member 207. These parts will be operated duringv the latter stages of the key strokes after the dwell portions or lower ends of the slots in the levers 151 begin to co-operate with the rod 146, at which time the lug 162` of the operated cam lever will engage with the ledge 195, swinging the second rocking Jframe 1n which said ledge is comprised on its pivots, pulling the link 189 forward and rocking the lever 181 oppositely from the lever 114, the upper arm of said lever 181 swinging rearward to unlock the crank arm 110 and rock the shaft 97, this movement bodily swinging the column stop supporting structurecomprising the rock shaft 90 and the column stop bar 76 upward, projecting the selected or predetermined `-stop lug 74 into the path of the co-operating stops on the carriage. Concurrently the pin 199 effects the release of the carriage.

In the drawings the column selecting operation is illustrated in connection with the operation of the column selecting key for the third column, said key and the parts controlled by it being shown in normal position in Fig. 1, and the positions corresponding to the partial and -full depressions ot said key, being illustrated respectively in Figs. 13 and 14. As a result of depressing the third column key from the Fig. 1 to the Fig. 13 position, the connected cam lever 151 will be actuated, causing the cam slot 157 therein, acting against the cross bar 146, to swing its rocking frame rearward and correspondingly rock the shaft 90 in its bearings to a predetermined extent suiicient to carry the stop lug 74 of the third or 3 column stop rearward until it is directly under or in line with the co-operating stops. This movement brings the mouth of the dwell portion in the cam slot 157 into co-operative relationship with the cross rod 146, and thelug 162 contiguous to the ledge 195; while the guide pin 109 is brought into line with the third slot or guideway 206and the contact 183 will be swung rearward ready to engage with the three-arm locking lever 207, all as illustrated by full lines in Fig. 13.

During the second stage of the key stroke as the key is depressed from the full line position of Fig. 13 to the position illustrated thereinby dotted lines, the cam lever 151 will be swung upward, causing the dwell to co-operate with the cross bar 146, leaving the first rocking frame unaffected while the lug 162 will press upward the ledge 195, swinglng the second rocking frame on its pivots; thus the train of connectionsfor communicating dierential movements to the'column stops will be unaffected during the second stage of operation, the other train comprising the second rocking frame and the lever 181 being actuated. As the upper arm of the lever 181 swings rearward, thecontact 183, acting against the arm 210, will swing the lever 207 from the Fig. 13 to the Fig. 15 position, causing the arm 208 of said lever to clear the locking abutment 21,4. This operation it will be understood, takes place prior to the engagement of said contact with the face a of the crank or lever arm 110 which remains stationary during the unlocking movement of the lever 207. The parts are positioned and arranged so that as the arm 208 clears the abutment 214 the contact- 183 will engage with the face 110a and will actuate the arm 110, swinging it and the rock shaft 97 and connected parts from the Fig. 13 to the Fig. 14 position."

From the latter figure it will be observed that as the result of this final stage of operation the column stops and the stop bar 76 will be moved upward in a second or different direction from their iirst direction of movement, this second direction being at an angle which is substantially a rightangle to said irst direction. As a result of this upward movement, which is participated in by the arm 104, the langed pin 107, 108 will be moved upward in the slot 116 and the guide pin 109 will move up into engagementl with the central guide slot 206 so' that at the end of the movement it will be contiguous to the closed end of said slot. The slot co-operates with the pin 109 to guide the arm 104, rock shaft 90, arms 83 and stop bar 76 in a predetermined path during their upward movements so as to insure that the lug 74 of the third column stop will be brought to arresting position, that is, into the path of the carriage-carried stops. It will also be observed from Fig. 14 that the pin 199 has swung forward, operating the releasing lever member and releasing the carriage, without, however, disturbing the release bar 56 which is controlled by the carriage release key. Assuming that the carriage is at the right-hand limit of its travel it will, when thus released, be drawn leftward by the spring drum, the carriage-carried stops skipping or passing the 1 and 2 column stops and the cam edge 63a of the stop blade 63 engaging with the projected lug 74 of the 3 column stop. As the movement of the carriage continues the blade 68 will be swung or cammed upward far enough, as illustrated in Fig. 5, to enable the carriage to continue its movement a short distance further until it is arrested by the engagement ot' the inner or contact face of the stop blade 62 with the projected stop lug 74. As soon as the blade 63 clears the projected column stop said blade will be forced down by its spring to normal position, with the result that it will prevent re-action or recoil of the carriage from t-he projected column stop and will leave the latter positioned with its lug 74 confined between the two blades 62 and 63 as illustrated in Fig. 6. The third column key may now be released7 causing the parts controlled thereby to be restored to normal position by the associate restoring springs and leaving the carriage located ready for writing in the third column on the work sheet. Said work sheet may be oit' ordinary form,'is not shown in the drawings, but of course it is to be understood that it is in position on the platen and that the column stops are adjusted in accordance with the columns on said sheet. Enough has been said, it is believed, to give a clear understanding of the operations of the mechanism in selecting columns during normal tabulating runs of the carriage from right to left. 2

Our invention is also adapted for use in reverse tabulating as it is called, or column selecting work in which the movement of the carriage is from left to right. Assuming that the carriage is at or near the limit of its leftward movement under pull of the main spring, and that it is desired to arrest said carriage during its return movement in a predetermined column, as for example, the third column, then the operator depresses the third column key projecting the 3 column stop into the path of the stop blades 62 and 63. Maintaining said column key depressed the operator pushes the carriage by hand back towards the right against the pull of the main spring, this return or reverse movement of the carriage continuing until having skipped both the 5 stop and the 4 stop, the under edge 62a of the stop blade 62 willengage with the projected lug 74 of the 3 stop, causing the blade 62 to be cammed or swung upward until it clears the projected stop lug, whereupon it will snap back to normal position. The carriage will continue its movement until arrested by the engagement of the inner or contact edge of the blade 63 with the side of the projected lug 74, thus positioning the carriage in the third columnar position. The blade 62 will at this time prevent leftward movement of the carriage under the pull of the main spring, since, on releasing the depressed column key, the third column stop will not be retracted below said blade until after the carriage has been restored to the control ofl its escapement mechanism by the return of the releasing devices to normal position.

Various changes may be made without departing from our invention.

What we claim as new and desire to secure by Letters Patent, is

1. In column selecting mechanism for typewriting machines, the combination of a plurality of column stops, a co-operativc stop, and key actuated means for moving certain of said stops first differentially in one direction to select the column and thereafter by the same key in another direct ion to arresting position.

2. In column selecting mechanism for typevvriting machine, the combination of a plurality of column stops, a co-operative stop, and key actuated means for moving certain of said stops first differentially in one direction to select the column and thereafter in another direction to arresting position, successive movements in the two directions being accomplished during single key actuations of said means.

Y3. In 'column selecting 'mechanism for typewriting machines, the combination of a plurality of column stops, a. co-operative stop, column keys, and means operative by single strokes of each of said keys for moving certain of said stops first in one direc.- tion to predetermined extents in order to select columns and then in another direction to arresting position.

4. In column selecting mechanism for typewriting machines, the combination of' a plurality of column stops, a co-operative stop, column keys, means for moving certain of said stops in one direction during the first part of a key stroke to a predetermined extent to select the column, and in another direction to arresting position during the second part of the key stroke, and devices for preventing movement in the latter di- L support, a

rection until the column selecting movement is completed.

5. In column selecting mechanism for typewriting machines, the combination. of a plurality of column stops, a co-operative stop, and key actua-ted means for concurrently movin certain of said stops in one direction variale extents to select the column and in another direction to arresting position, and devices for insuring completion of the variable movement prior to the movement towards arresting position.

6. In column selecting mechanism for typewriting machines, the combination of a plurality of column stops adjustable thereon, a co-operative Stop, and key actuated .means for differentially moving the stop support in one direction when a key is actuated to bring a predetermined column stop into line with said co-operative stop and for thereafter moving said stop support in another direction when the same key is actuated to bring the said predetermined column stop into arresting position.

7 In column selecting mechanism for typewriting machines, the combination of a plurality of column stops, a co-operative stop, and key actuated means for differentially moving the plurality of column stops about a pivotal center and thereafter Y about another pivotal center to bring a predetermined column stop into proper position for co-action with said co-operative stop, movements of said column stops in both directions being effected during single actuations of said means. 4

8. In column selecting mechanism for typewriting machines, the combination of a set of column stops, a co-operative stop, a set of column keys, and means operative by single strokes of said keys for differentially moving said set of column stops together transversely of said co-operative stop to bring predetermined column stops into line with said co-operative stop and for thereafter moving said set of column stops towards said co-operative stop into the path.

' thereof.

9. In column selecting mechanism for typewriting machines, the combination of a set of column stops, a co-operative stop, a set of column keys, and means for differentially moving said set of column stops together in one direction to bring predetermined column stops into line with said co-operative stop during the first part of the strokes of said column keys and for moving said set of column stops in another direction to bring them into arresting position, the movement in said other direction being effected during the latter part of the key strokes of said column kieys and :being obstructed prior thereto. A

10. In column selecting mechanism for typewriting machines, the combination of a set of column stops, a co-operative stop, a set of column keys, and means controlled by said keys for differentially moving said set of column stops together in one direction to bring predetermined column stops into line with Said co-operative stop and for concurrently moving said set of column stops together a uniform extent in another direction to bring selected column stops into arresting position.

11. In column selecting mechanism for typewriting machines, the combination of a set ofcolumn stops, a co-operative stop, a set of column keys, and means actuated -thereby for moving said set of column stops together predetermined variable extents about one pivotal center to bring predetermined column stops into line with said cooperative stop and for moving by the same keys said set of column stops together about a second pivotal center uniform extents so as to bring said column stop into co-acting position.

12. In column selecting mechanism for typewriting machines, the' combination of a set of column stops, a co-operative stop, a set of column keys, the keys of the set having substantiall uniform depression, and means controlle by said keys for both variably moving the set of column stops together and for also uniformly moving the column stops together, the variable and uniform movements of theJ column stops being parts of concurrent operations which bring redetermined column stops into position or co-action with said (zo-operating stop.

13. In tabulating mechanism for typewriting machines, the combination of a set of column stops, a co-operative stop, a set of column keys, and means operative to a different extent by each of said keys to move said column stops different extents to bring selected column stops into line With said cooperative stop, each of said keys being also operative to move a device included in said means to uniform extents to position said column stops in the path of said co-operative stop.

14. In column selecting mechanism for typewriting machines, the combination of a carriage, a plurality of column stops, a cooperative stop, key actuated means for differentially moving said plurality of column stops iirst in one direction to select the column and thereafter in another direction to arresting position, and carriage releasing Vdevices operative by said key actuated means after said column stops have been brought into the path of said co-operative stop.

15. In column selecting mechanism for typewriting machines, the combination of, a plurality `of column stops, a support therefor, a co-operative stop, key actuated means for selectively moving said support' in one direction to bring a predetermined column stop into line with said (zo-operative stop and for thereafter moving said support in another direction to bring the said predetermined column stop into the path of said c0- operative stop` and carriage releasing devices, said devices being operative by said means and being timed to release the carriage after the selective movement has been completed and after the predetermined column stop has been moved into the path of said (fo-operative stop.

1G. In column selecting mechanism for typewriting machines, the combination of a plurality of column stops, a co-operative stop, column keys, means operative by single strokes of -said keys for moving certain of said stops first in one direction to predetermined extents in order to select the co-lumns and then in another direction to` arresting position, and carriage releasing devices thereafter operative by said means to release the carriage.

17. In a typewriting machine, the combination of a carriage, a plurality of column stops on the frame of the machine, a co-operative stop on the carriage, key actuated means for differentially moving the plurality of column stops in a body variably in one direction and uniformly in another direction to bring predetermined column 4stops into the path of the co-operative stop, and carriage releasing devices automatically operative by said means to release said carriage and said co-operative stop after the movements of the column stops have been completed.

18. In a typeWriting machine, the combination of a carriage, a set of column stops, a co-operative stop, a set of keys one for each column stop, means controlled by said keys for differentially moving said set of column stops in a body in one direction to bring predetermined column stops into line with said co-operative stop and for concurrently moving said set of column stops a substantially unvarying extent in another direc-A tion to bring the selected predetermined column stops into arresting position, and devices for releasing said carriage operated by said means after the movement of the column stops has been completed.J

19. In column selecting mechanism for typewriting machines, the combination of av carriage, a plurality of column stops, a cooperative stop, key actuated means for differentially moving certain of said stops first in one directionto select the column and thereafter in another direction to arresting position, a train of carriage releasing devices operative by said key actuated means after said column stops have been brought to arresting position, and a lock for said train of releasing devices, said lock remaining operative during the entire column selecting movement of the stops but subsequently being rendered ineffective by said key actuated means;

20. In column selecting mechanism for typeWriting machines, the combination of a plurality of column stops, a co-operative stop, key actuated means for moving the plurality of column stops different extents in one direction to bring a predetermined column stop into line With' said co-operative stop and for thereafter moving said column stop in another direction to bring the said predetermined column stop into the path of said co-operative stop, carriage releasing devices operative by said means and timed to release the carriage after the selective movement of said co-operative Stops has been completed and after said stops have been moved into the path of said co-operative stop, and a normally operative lock for said releasing devices that remains unaffected during the first stage of movement of the column stops but is automatically unlocked after said stops have been moved into line with said co-operative stop.

21. In a typeWriting machine, the combination of a carriage, a plurality of column stops on the frame of the machine, a cooperative stop on the carriage, key actuated means for differentially moving the plurality of column stops variably in one direction and uniformly in another direction to bring predetermined column stops into the path of the co-operative stop, carriage releasing devices automatically operative by said means after the movements of the column stops have been completed, and a lock .for said releasing devices that is vautomatically unlocked after said stops have been moved into linewith said co-operative stop.

22. In a typewriting machine, the combination of a carriage, a set of column stops, a co-operative stop, a set of keys one for each column stop, means controlled by said keys for moving said set of column stops different distances in one direction to bring predetermined column stops into line with said co-operative stop and for concurrently moving said set of column stops a substantially unvarying extent in another direction to bring the selected predetermined column stops into arresting position, devices for releasing said carriage operated by said means after the movement of the column stops has been completed, and a lock for said releasing devices that is normally effectiveA but. is automatically rendered ineffective during the final stage of the key movements.

23. In reversible tabulating mechanism for typewriting machines, the combination of a traveling carriage, a plurality of column stops, a pair of co-operative stops, column keys, and means operated by single strokes of said keys for moving certain of said stops first in one direction to predetermined extents in order to select columns operating stops 'v each and then in lanother direction to arresting position, the column stops co-operating with one of said co-operative stops during travel of the carriage in one direction and with the other of said co-operative stops durin the travel of the carriage in the opposite irection.'

24. In reversible tabulating mechanism for typewriting machines, the combination of a traveling carriage, a set of column stops, a pair of co-operative stops, a set of column keys, and means for differentially moving all of said set of column stops in one direction to bring predetermined column stops into line with said pair of coduring the first part of the strokes of said column keys and for moving all of said column stops in another direction to bring them into position to arrest the carriage in either direction of its travelby engagement with one or the other of said co-operative stops, the movement of said column stops to engaging position bein effected during the latter part of the key strokes of said column keys.

25. In reversible tabulating mechanism for typewriting machines,the combination of a traveling carriage, a set of column stops, a pair of co-operative stops on said carriage, a set of column keys, and means operated to a different extent by each of said keys to move the set of column stops different extents to bring selected`column stops into line with said co-operative stops, of said keys being also operative to move said column stops into the path followed by said co-operative stops during the travel of the carriage, said column stops co-operating with one of said co-operative stops during travel ofthe carriage in .one direction and with the other of said cooperative stops during the travel of the carriage in the opposite direction.

26. In tabulatin mechanism for typewriting machines, t e combination of a travcling carriage, a column stop, a pair of Ycooperative stops pivoted to swing independently of each other in a plane parallel with the path of movement of said carriage, the pivotal axes of said co-operative stops being parallel with each other and extending at right angles to said path of movement, said co-operative stops belng spaced apart to receive the' column sto between them, and key operated means or effecting co-operation between said column stop and said cooperative stops.

275111` tabulating mechanism for typewriting machines, the combination 'of a traveling carriage, a column stop, a pair of spring pressed co-operative stop blades arranged end to end and spaced apart to receive the column stop between them, pivots at the outer ends of said stop blades, and

key operated means for eiectmg co-opera' vwriting machines,

typewriting machines,

tion between said column stop and said cooperative stops.

28. In tabulating mechanism for typewriting machines, the combination of a traveling carriage, a column stop on the frame of the machine, a detachable bracket on said carriage, a pair of stop blades pivoted on said bracket and arran ed end to end to receive said column stop etween them, a limiting stop common to said blades, spring means normally maintaining said blades engaged with said'limiting stop, and key operated means for effecting co-operation between said column stop and said co-operative stops.

29, In tabulating mechanism for typewriting machines, the combination of a traveling carriage, a column stop on the frame of the machine, carriage, a pair of stop blades pivoted on said bracketand arran ed end to end to receive said column stop Iietween them, a limiting stop common to said blades, spring plungers one forv each blade, said plungers operating to maintainsaid blades normally engaged with said limiting stop, and key operated means for effecting co-operation between said column stop and said co-operative stops.

30. In tabulating the combination of a traveling carriage, a column sto on the frame of the machine, a detachable racket on'said carriage, a pair of stop bladespivoted on said bracket and arran ed end to end to receive said column stop etween them, a limiting stop common to said blades, said limit-Y ing stop having a portion which serves as a' guide for the free end portions of said blades during their pivotal movements, spring means normally maintaining said blades engaged with said limiting stop, and

e key operated means or effecting co-operation between said column stop and said cooperative stops.

31. In reverse tabulating mechanism for typewriting machines, the combination of a traveling carriage, a key actuated tabulator stop, and a pair of pivoted plane and having oppositely disposed cam edges that co-operate with said key actuated stop, said blades being provided withparallel arresting faces having a constant relationship.

32. In column selecting mechanism for the combination of a traveling carriage, a stop thereon, a set of column stops, a support on the frame of the machine for said column stops, a set of key actuated devicesfor variably actuating-said colu'rnn stops, connections between said key actuated devices and said column stop support, and a frame on which said key actuated devices and said connections are mounted,

a detachable bracket on said;4

mechanism for typelun lll)

co-operative stop blades end to end to swing in a common machine frame and constituting, togetherl with said key actuated devices and said' connections, a unitary structure removable as a whole from the machine and replaceable as a whole on the machine.

In tabulating mechanism for typewriting machines, the combination with a plurality of co-operatingstops, means including a plurality of key operated members for variably controlling certain of said stops, a support for said means provided with a pair of hooks for engaging the machine frame, and screws for securing said support in place, said support and said means together constituting a unitary structure which may be detached when said screws are unscrewed.

34. In key operated column selecting mechanism for typewriting machines, the combination of a frame on which certain of the key actuated devices and connections of said mechanism are mounted, said 'frame being provided with a pair of hooks for engaging the machine frame, and a pair of screws for securing said framefin place, said frame together with the parts mounted on it constituting a unitary structure which is readily removable as a whole when said screws are unscrewed.

35. In tabulating mechanism for typewriting machines, the combination of a plurality of tabulator stops, means inculding a plurality of key operated membersfor variably controlling certain of said stops; and a supporting frame for said means comprising a pair of parallel plates provided with hooks, and cross bars connecting said plates, said frame being hooked over and screwed'to stationary parts of themachine and constituting together with said meansl a unitary structure which is detachable ,as a whole.

36. In tabulating mechanismjfor typewriting machines, the combination of a plurality of co-operating stops; means for variably controlling certain of said stops, said means including a plurality of key operated members and two rockingfframes; and a supporting frame for said means comprising a pair of parallel plates provided with hooks and cross bars connecting said plates, said rocking frames being pivoted to said side plates and said members being pivoted to one of said cross bars, said supporting frame being hooked over and screwed to stationary parts of the machine and together with the parts mounted on it constituting a unitary structure which is detachable as a whole.

37. In a typewriting machine, the combination of a keyactuated member, a sheet metal key stem connected thereto and shaped to provide an opening which at the free end ofthestem is completely enclosed by the metal of the stem, and a key cap provided with a flat projection which is split and terminates in a headed portion, said head being adapted to be forced through the opening in the free end portion of the key stem and thereafter expanding through the spring of the metal composing the projec` tion, t-he key cap being thereby detachably secured to the key stem.

38. In a typewriting machine, the combination of a key actuated member, a sheet metal key stem connected thereto, and U- shaped in cross section except at its top portion where the edges of the metal are curved to provide a substantially enclosed opening, and a key cap provided with a spring metal projection terminating in a bifurcated head which is adapted to be forced through said opening in said projection, the parts of said head thereafter separating to interlock the key cap and the key stem.

39. In a typewriting machine, the combination of a key actuated member, a key stem connected thereto and `provided with an opening, and .a detachable key cap provided with a spring extension adapted to co-opcrate with the opening in said key stem to interlock said key cap and said key stem.

40. In tabulating mechanism for type- 1 writing machines, the combination of a stop bar, a plurality of tabulating stops thereon, a co-operating stop, a rock shaft, a pair of crank arms on said rock shaft on which said stop bar is supported, a second pair of crank arms supporting said rock shaft, a second rock shaft to which said second pair of crank arms are secured, and key operated means for actuating said rock shafts and said crank arms.

41. In tabulating mechanism for typewritingmachines, the combination of a plurality of tabulating stops, a coeoperating stop, a stop bar on which certain of said stops are mounted, a rock shaft, a pair of crank arms on said rock shaft on which said stop bar is supported, a second pair of crank arms supporting said rock shaft, a second rock shaft to which said second pair of crank arms are secured, a plurality of tabulator keys, and operative connections between said keys and said rock shafts and crank arms. t

42. Intabulating mechanism for typewriting machines, the combination of a plurality of tabulating stops, a co-operating stop, a stopbar on which certain of said stops are mounted, a plurality of tabulator keys, and connections between said keys and said stop bar .including two rock shafts and pairs of crank arms on said rock shafts.

43. In column selecting mechanism, the combination of a stop bar, a plurality of tabulating stops thereon having their stop portions arranged in stepped order; a cooperating stop; a plurality of tabulator 

